EPA Regulatory Reconsideration of Fine Particulates

I betray no secret when I report that much regulatory policy has been deeply politicized, and that is a vast understatement when it comes to many EPA actions under the Clean Air Act. Consider the regulation — the promulgation of a new National Ambient Air Quality Standard — of fine particulate matter (“PM2.5”), which, under the terms of the CAA, EPA is required to review every five years in light of “the best available science.”